Looking at some of the flights from the northeast to south Florida, there are some interesting routings to give Irene an understandably wide berth as she starts to make landfall in North Carolina and up the coast. In some cases it looks like flights are going almost 300 miles out of their way:

Wow, those are definitely some interesting tracks!! Well, I guess there really wasn't an option as the storm pushed a lot of flights to take over-land routes that normally wouldn't. B6 normally uses over-water routes, in fact I've been on JFK-Florida flights where I couldn't even see land. So that pushed a lot of extra volume into (most likely) already crowded inland routes.

Earlier in the week when the storm was over the northern Bahamas - everything headed to MIA, FLL, PBI was flying down to Tampa and then east across the Glades to those airports. Departures also taking that route.